Method of forming envelop-blanks.



Patenteei June 29, 19

3 SHEETS-SHEET 3.

'- Li'eeseo.

' j machines paper ofuniform width is fetl hylongituclh Wofces'ter, in the Commonwealth sees-es; v

e-swismes I woecssseis, messeceosssss, flssszcegson so 1mm seem-1 A Emmeys courses, or 'ssmisesism, messsoaushms, e eusmeimnes To all :whom ebhcm:

Be it knownthet I, WILLARDE; SWIFT, e

citizen of, the-United- Statles residing at county of {ofcest'es and .of- Massachusetts; have invented a new and" useful Improvement in Methodsof Forming E elop-Blenks, of which the following is a specification eoeompanied by drawings, forming a pest: of the,

seme.

)Iitim1ousweb-' ee pe er, and-it. es for its to-he medeffromblanks-{of anew-ides,"-

. My present'in exltioiiisephlicehleto that class ofmechines known as roteey .envelo'g' 1II- Wh16h the eontmeous. strip of Bel movement through the machine; the entire length of the; blanks being 'cletex'mined by a transverse cuttingmeehenism operating at fixed periods the 'operetionIof-the me 1 P P as my method of veryi ig the size of the hotly of ehine. In

more 01" less frequentfiliterv'els es iongeror shorterenvelops were re'ogiired. This neces of forming'bleiiks from e'eontinu'ousstrip forenvelops of varying sizes without ohauging the length I of the Blank,

same transverse cutting mechenis nflto be.

employed without chenge in its periods of v the fohlecl envelop without chenggig the or, ex

operation.

neotion with any.

paper, or of the class of envelop machines represented bythe machine described in the est, July 1%, 1908,

ute'nt issuedto; James 1 In the accompanying drawings 1 have illustratii-themethod of varyin thesize of the envelop withublanks of uni erm length endwidth. I I I Figure 1 represents an envelop blank formed from a section of a continuous strip and illustrating by hrokenlines issssesos soseeise Essence-"em ass the eiuveioh without changing of a. rotary envelop machine by -My-inventio n relates to emethodQofformin envelop blenksvwhieh ere to be Quill 3n ,fo ded upon that class;ofi-ehfvelop-mechmes v Similar reference letters refer to 'snml adapted to "menufecturee ivelo sfirom a,

parts in thelclifie'rent 1 I e AContinuouS strip oi-umformwidth, rep' enable euveope of-diflerent. sizes uniform length" by a trer sverseouttiu oindiv cluel hlanks; as represented by fu1 machines of this class it hasheen; customery so-change the'tran'svei'se eutting mechenism'in oz'der th'et it might operate at then folded on the broken lines qtheirfedges overlappingend the beok flap 79 is io 'loled'on the broken line'm,

enabling,- the the aggregate length the body of length to that sho'Wri in Fig. 3. If the Set:-

also' removed the body. por- 4 tion vof the eiwelop will be still'further re each variation in the l t s 1 ep m iifim -m m e vPeuteertedJuli 1e29,191-5 'epplieati'oh ties tin-ism""serialiteleeesie.

the blank; Figs'2, 3 emit regr'esent three v fol sizes of completed envelope serits a, portion of a continuous strip; show envelope of difiierent sizes the. length ofthe envelop. Fig;v 6 illustrates the-method of varying the size without i-a change of length, and Bi I resent folded envelope of different widths views. o

resented in Fig 5gismoveclthrough the-me chine in. hev

ed fro'mgthe blanks illustrated in Fig.1. Figep p' elf v the-blenks fon y the operation a. chenge'in I V 1, gs. 4, Send 9 rep:

I directiouof the er1owa.f Seev tions 6; o ar removed from its-slc'les by any suitehle cutting mechanism; such, for exam-j strip ere then severed. o

mechanism formi i that shown in the aforesaid patent to JzimesWest. The reduced. portions of the.

the-brokenjlines d, y

'a'; back fle p 9 ends seel flap h.-

gummed at'fj,' Fig.1 The siele flaps are forming 7c and [with the body portion ofau enveloprepresented"? inFig.-2. I 7

By increasing the length of the sectionsb 1 and c whiohere, removed from the'sides of the continuous, strip, 1. deere ese vthe length of the sideflsps eu'cl proportionately increase by reducing position of the transverse, out 0!.

ample, iithe sectiousb and 0 Fig. 5, are increased by theedfiitlonel seotlons n and 0, j

tions 30 and g are duced to the size shownin Fig. 4. In-th'e w-iilbe correspondingly increased in'len 'h, as shown at 1*,Fig; 3, and s, Fig- 4:; ith length of the side flaps I eter to maintain a uniform width] of the tip or Tee end of the'seal flaps;

line of fold of the seal flap is moved. farther the euvelop'will he reduced; in J Asthe' 19 I of the end flaps, there the size of the body portion of from its tip the angle between the line of,

fold' 'and the side of the seal flap is increased as illustrated in Fig. 1, where the angles between the sides of the seal flaps and their end flapsC are .reduced inwidth, bringing the'linesof fold between the body of the envelop and seal flap D and back flap E nearer together, forming an envelop of the size shown in Fig. 8, in which the seal flap D and back flap E are each e ually increased in size to correspond with t e reductionin the width of the body of the envelop. If sections indicated by 'the broken lines A on the right hand side and F on the left hand side be removed, the envelop will remain the same-width but with the'back flaps of the same width as'in Fi 7 5 while the seal flap 011% will be increase in width.

forming each of the sizes of envelops,. shown in Figs. 7, 8 and 9,'the continuous strip. is severed transversely on the dash and dot lines G', making all the blanks of.

uniform length. I

The variation in the sizes ofv the'envelops blanks both cases the spaces between the transverse cuts by which-the strips are severed mtO'ili- 40 dividual blanks remain the same malnngthe of uniform length. I f

I- claim 1. The

in that dimenslon "running ve opsvarying1 e stri consistin in var 7 b g lengthwise of t the areas removed from the edges of the] stri andseyering the strip' transverselyjitl? unl orm intervals. i

- .2. The within described method of form ing blanks from 'a continuous strip of uni form width for envelopsof-diflerent heights,1

consisting in removing sections of. the edges tions at uniform intervals.

Dated this eighth day of August 1911. 1

WILLARD E. swiF'r;

Witnesses PnNnLorn COMBERBAGH, Nnnnm IWHALEN.

Copies'of this patent may be obtained for five cents each, by addressing the Commissioner (if-Patents, I Washington,-IJ. G. 1

within described method of form: -1n blanks from a continuous strip, for en-}' 

